Balance Sheets (Parentheticals) - USD ($) $ / shares in Thousands, $ in Thousands	Sep. 30, 2019	Sep. 30, 2018
Allowance for doubtful accounts	$ 0	$ 0
Preferred stock, no par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares oustanding (in shares)	0	0
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	48,053,084	48,053,084
Common stock, shares outstanding (in shares)	48,053,084	48,053,084